VB.NET: Get The Status Of Multiple Letters with GetLetterStatusRange()


  1. Create a new Console Application project and add a web reference
  2. Copy the entire code below, delete anything written in your application and paste the code there
  3. Replace "MyUsername" and "MyPassword" with your PostalMethods user details
  4. Replace "ID1" with the low LetterID of the range and "ID2" with the high LetterID of the range for which you would like to get the status
  5. Start your application. If the response is -3000, you will see the status report. If the response is any other number, check the Web Service Status Codes section.
Imports System.IO
Module Module1
    Sub Main()
        Dim objPM As New com.postalmethods.api.PostalWSSimple()
        Dim objResult As com.postalmethods.api.GetLetterStatus_RangeResult
        ' Invoke the GetLetterStatus_Range method
        objResult = objPM.GetLetterStatus_Range("MyUsername", "MyPassword", ID1, ID2)
        ' Check response status
        If objResult.ResultCode = -3000 Then
            ' -3000 means that the data was successfully retrieved.
            For Each status As com.postalmethods.api.LetterStatus In objResult.LetterStatuses
                Console.WriteLine("ID: {0}", status.ID)
                Console.WriteLine("Last update time: {0}", status.LastUpdateTime)
                Console.WriteLine("Status: {0}", status.Status)
            ' A value less than -3000 means an error occurred.
            ' See the PostalMethods Status Codes: http://www.postalmethods.com/statuscodes.
            Console.WriteLine("Error is:" & objResult.ResultCode)
        End If
        ' In debug mode, the following lines prevent your console application from closing automatically upon termination
        Console.WriteLine("Hit ENTER to terminate application")
    End Sub
End Module